EP 0447448 B1 19940907 - METHOD FOR PURIFICATION OF ACIDS FROM MATERIALS COMPRISING ACID AND SALT.
Title (en)
METHOD FOR PURIFICATION OF ACIDS FROM MATERIALS COMPRISING ACID AND SALT.
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON SÄUREN AUS SAUREN UND SALZHALTIGEN LÖSUNGEN.
Title (fr)
PROCEDE DE PURIFICATION D'ACIDES A PARTIR DE MATERIAUX COMPRENANT UN ACIDE ET UN SEL.
Publication
Application
Priority
- US 8905088 W 19891117
- US 27806288 A 19881130
Abstract (en)
[origin: WO9006168A1] A method of separating acid from an aqueous feed stream comprising acid and salt. The method is conducted in an apparatus comprising a bipolar membrane (20) between at least one first anion membrane (30) and at least one second anion membrane (32).
IPC 1-7
IPC 8 full level
B01D 61/44 (2006.01); C01B 7/01 (2006.01); C01B 7/07 (2006.01); C01B 7/19 (2006.01); C01B 17/90 (2006.01); C01B 21/46 (2006.01); C01B 25/18 (2006.01); C01B 25/238 (2006.01); C01B 35/06 (2006.01); C01D 1/38 (2006.01); C23G 1/36 (2006.01); H01M 10/54 (2006.01)
CPC (source: EP KR US)
B01D 61/445 (2013.01 - EP KR US); C01B 7/0706 (2013.01 - EP KR US); C01B 17/902 (2013.01 - EP KR US); C01B 21/46 (2013.01 - EP KR US); C01B 25/18 (2013.01 - EP KR US); C01B 35/063 (2013.01 - EP KR US); C01D 1/38 (2013.01 - EP KR US); C23G 1/36 (2013.01 - EP KR US); H01M 10/54 (2013.01 - EP KR US); Y02W 30/84 (2015.05 - EP US)
Citation (examination)
- US 4740281 A 19880426 - CHLANDA FREDERICK P [US], et al
- Journal of Membrane Science, volume 27, no. 2, June 1986, Elsevier Science Publishers B.V., (Amsterdam, NL), H. Voss: "Deacidification of citric acid solutions by electrodialysis", pages 165-171 see summary; page 167, lines 1-3; page 169, lines 28-43; page 171; figure 3
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9006168 A1 19900614; AT E110979 T1 19940915; AU 4750090 A 19900626; AU 634196 B2 19930218; CN 1043089 A 19900620; DE 68918111 D1 19941013; DE 68918111 T2 19950105; EP 0447448 A1 19910925; EP 0447448 B1 19940907; ES 2058883 T3 19941101; JP H04501978 A 19920409; KR 900701381 A 19901201; US 5162076 A 19921110; ZA 898788 B 19900829
DOCDB simple family (application)
US 8905088 W 19891117; AT 90900542 T 19891117; AU 4750090 A 19891117; CN 89109028 A 19891128; DE 68918111 T 19891117; EP 90900542 A 19891117; ES 90900542 T 19891117; JP 50074990 A 19891117; KR 900701657 A 19900730; US 27806288 A 19881130; ZA 898788 A 19891117